Studied by 0 people
Looks like no one added any tags here yet for you.
Light (I) bands
A light band across a striated muscle fiber that consists of actin
Dark (A) bands
One of the cross striations in striated muscle that contain myosin and appear dark
an electrical event occurring when a stimulus of sufficient intensity is applied to a neuron or muscle cell allowing sodium ions to move into the cell and resume the polarity
a response that varies directly with the strength of the stimulus
a single rapid contraction of a muscle followed by relaxation
When the muscle is stimu-lated so rapidly that no evidence of relaxationis seen and the contractions are completelysmooth and sustained
muscle contraction in which the muscle does not completely relax between stimulation events; causes an increase in force because individual twitches are added together, or summed
the addition of a phosphate (PO43−) group to a protein or other organic molecule
a compound that transfers a phosphate group to ADP to regenerate ATP in muscle fibers
Aerobic pathway
requires oxygen to produce ATP, because carbohydrates and fats are only burned in the presence of oxygen
the process most living things undergo to use food energy
Anaerobic glycolysis and lactic acid formation
involves the breakdown of glucose to pyruvic acid (pyruvate) and, subsequently, to lactic acid (lactate)
the product of anaerobic metabolism, especially in muscle
Anaerobic glycolysis
a metabolic process that generates energy for cells when oxygen is limited
Muscle fatigue
Inability of a muscle to contract even when being stimulated
the volume of oxygen required after exercise to oxidize the lactic acid formed during exercise
refers to "same tone"; the muscle shortens as it contracts, and movement occurs
refers to "same length" the muscle generates tension but does not shorten and no movement occurs
sustained partial contraction of a muscle in response to stretch receptor inputs; keeps the muscle healthy and ready to react
Flaccid
lacking firmness or muscle tone, or being soft and yielding
reduction in size or wasting away of an organ or cell resulting from disease or lack of use
Aerobic/endurance exercise
Process that requires oxygen
Resistance/isometric exercise
a type of resistance exercise that involves contracting a muscle or group of muscles without changing their length
Origin
immovable (less movable) bone
Insertion
The attachment of a muscle tendon to a movable bone
Antagonists
Muscle that opposes or reverses a prime mover
Synergists
muscle that aids a prime mover in a movement and helps prevent rotation
Fixators
a muscle that stabilizes a body part to allow other muscles to move it from a stable base.
Circular
refer to muscles, folds, or layers of the body that form a circle
Convergent
a muscle that has a wide area of expansion and a single attachment point
Parallel
fascicles run parallel to the long axis of a muscle
Fusiform
having a spindle shape, or being wide in the middle and tapering at the ends
Pennate
muscles with fibers that are arranged at an angle to the muscle's line of action
Prime Mover
The muscle that acts as the initial and main source of motive power
Note 
Flashcard (41)